Connect the power and Leitner mini-USB cords to the back of your charging base
If your Mac has a regular USB (USB-A) port, connect the Leitner USB cord directly. Otherwise, connect to a USB-C converter and then connect this to your Mac
In your Mac, click the Apple icon in the upper left. Choose System Preferences, then Sound
Now, check both Output and Input and make sure they are each set to "Leitner Headset"
That's it! Just turn on your headset, choose Computer Mode, and rock and roll!